Deimos has one advantage that the other two don't - near-zero gravity. Like Mars, it has a day/night cycle that Humans and plants can adapt to. It almost certainly has water ice. The delta v budget is such that it's actually one of the easier places to mine ice to return to Earth orbit. It has locations where a PV panel can give 24/7 power. The near zero-gravity means landing is a low-cost maneouver. If the spacecraft creates g-force by rotating during it's trip out, it can contiue to do that at Deimos. It can use Deimos dirt as extra shielding.